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The LS7 can be pretty expensive, but you can always buy a stroker 427 ci kit for your LS3. The rise of stroker kits has also increased the number of displacement options. There are also options when deciding if you want an iron or aluminum block. Car engines came in 5.3L, 5.7L, 6.0L, 6.2L and 7.0L size engines, some configured for front-wheel-drive. Chevy trucks came with iron-block 4.8L and 5.3L they also came with all-aluminum 6.0L and 6.2L engines. Since the LS engine came in a variety of automobiles, General Motors needed to develop different size engines for different uses. Although some performance parts can be expensive, replacement parts are generally dirt cheap compared to high-performance Japanese engines. The main reason is that Chevrolet is one of the largest manufacturers in the US, and many companies make parts for Chevy products. Replacement performance parts are also very cheap, and this is due to a number of reasons. You can walk into any junkyard and find an LS engine within a few minutes. This has kept prices fairly low, and with the rising popularity of LS swaps the prices have dropped further. Since they were put in so many cars, there is a slight overabundance of them. This minimizes cylinder bore distortion and variation in the head bolt torque spec.Ĭhevrolet Performance has produced the LS engine since 1997, and they came in everything rear-wheel drive. Chevy designed the block to take extra long head bolts that thread deep into the block. Chevrolet took it a step further by not just designing an incredibly strong bottom end, but also a strong top end. This design provides great crankshaft and block rigidity. This is what GM engineers call snap-fit cross-bolting. Four bolts are facing vertically, and two bolts horizontally that clamp the block wall to the main cap. The Y-block design allows them to use 6 bolt main caps on the crankshaft.
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Previous small blocks didn’t have this design. The Y-block design helps increase rigidity in the main cap area. Let’s start with the block design. General Motors designed the Gen III (LS) block as a “Y” block. What would a good engine be without a solid foundation? Chevrolet knew that the strength of the block was extremely important when they developed the LS V8 engine. Top Six Reasons Why the Chevrolet LS V8 Engine Family are just so Damn Good 6.